When the AuthzAccessCheck function is called, each ACCESS_DENIED_CALLBACK_ACE structure contained in the DACL of a SECURITY_DESCRIPTOR structure passed through a pointer to the AuthzAccessCheck function invokes a call to the application–defined AuthzAccessCheckCallback function, in which a pointer to the ACCESS_DENIED_CALLBACK_ACE structure found is passed in the pAce parameter.

Syntax

Members

Header

ACE_HEADER structure that specifies the size and type of ACE. It also contains flags that control inheritance of the ACE by child objects. The AceType member of the ACE_HEADER structure should be set to ACCESS_DENIED_CALLBACK_ACE_TYPE, and the AceSize member should be set to the total number of bytes allocated for the ACCESS_DENIED_CALLBACK_ACE structure.

Mask

Specifies an
ACCESS_MASK structure that specifies the access rights explicitly denied by this ACE.

SidStart

The first DWORD of a trustee's SID. The remaining bytes of the SID are stored in contiguous memory after the SidStart member. This SID can be appended with application data.

Remarks

The access rights specified by the Mask member are granted to any trustee that possesses an enabled SID that matches the SID stored in the SidStart member.

When an ACCESS_DENIED_CALLBACK_ACE structure is created, sufficient memory must be allocated to accommodate the complete SID of the trustee in the SidStart member and the contiguous memory that follows it.